124 SILVICULTURE METHODS OF ARTIFICIAL REPRODUCTION 



Spacing for trees in general planting as used in the Lake States 

 and Northeast is as follows: 



SPECIES 



White pine 



White spruce 



Norway spruce 

 Norway or red pine 

 European larch 

 Scotch pine 



SPACING (FEET) 

 4 x 6 or 6 x 6 

 6x6 

 6x6 



6 x 6 or 8 x 8 

 6 x 6 or 8 x 8 

 6x6 



Ponderosa pine is generally spaced 8 by 8 feet in the West; Doug- 

 las fir, 8 by 8 or 6 by 6 feet; and western white pine, 6 by 6 and 

 8 by 8 feet. 



The number of plants per acre for some typical spacing is as 

 follows : 



SPACING IN FEET NUMBER OF TREES PER ACRE 



4x4 2722 



5x5 1742 



6x6 1210 



8x8 680 



10x10 . 435 



FIG. 65. An interior view of a 24-year old Norway spruce plantation. These 

 trees are nearly large enough to supply pulpwood, worth $3 to $5.00 per cord, on 

 the stump. The lower branches have been pruned to produce clean boles and 

 to eliminate knots. This forest is in need of thinning. 



